~$200-$300 DACs to go along with the Schiit Asgard 2

I've been looking at the Schiit Asgard 2 for my Mad Dogs w/ Alpha Pads, and I need a nice DAC that can plug into my computer via USB. I looked at the Bifrost, but apparently it didn't come with USB, and is a bit too expensive. Are there any other DACs that I could use in the place of the Bifrost that work well with the Asgard 2, and come with USB output?